82201811 has 4 divisors (see below), whose sum is σ = 82263312. Its totient is φ = 82140312.

The previous prime is 82201799. The next prime is 82201813. The reversal of 82201811 is 11810228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82201811 - 2¹⁰ = 82200787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82201813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28700 + ... + 31433.

It is an arithmetic number, because the mean of its divisors is an integer number (20565828).

Almost surely, 2^82201811 is an apocalyptic number.

82201811 is a deficient number, since it is larger than the sum of its proper divisors (61501).

82201811 is a wasteful number, since it uses less digits than its factorization.

82201811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61500.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 82201811 is about 9066.5214387879. The cubic root of 82201811 is about 434.8042647817.

The spelling of 82201811 in words is "eighty-two million, two hundred one thousand, eight hundred eleven".